Density describes substances based on much mass they have in a certain volume. Less dense solutions and objects float on top of solutions of greater density. Disposal: Pour the liquids out of the ...

A new approach to invisibility cloaking may one day be used at sea to shield floating objects – such as oil rigs and ships – from rough waves. Unlike most other cloaking techniques that rely on ...

Going bottom-up is no problem for a boat on the underside of a levitated liquid. In a container, liquid can be levitated over a layer of gas by shaking the container up and down because the repeated, ...